issue_uscsi_cmd
status = issue_uscsi_cmd(fd, &ucmd, USCSI_READ);
status = (issue_uscsi_cmd(fd, &ucmd, 0));
status = (issue_uscsi_cmd(fd, &ucmd, 0));
static int issue_uscsi_cmd(int file, struct uscsi_cmd *command, int flag);